diff options
| author | Jeff Johnston <jjohnstn@redhat.com> | 2013-04-10 18:47:46 +0000 |
|---|---|---|
| committer | Jeff Johnston <jjohnstn@redhat.com> | 2013-04-10 18:47:46 +0000 |
| commit | 602cec7f1eb17b96525d09752fd1f0ad474e3202 (patch) | |
| tree | 32e10a62bf758fcbb8951c4361a974a7066461c3 /newlib/libc/stdio/fflush.c | |
| parent | b49dae4a4443858b2ce51daac3883ad0f1473145 (diff) | |
| download | cygnal-602cec7f1eb17b96525d09752fd1f0ad474e3202.tar.gz cygnal-602cec7f1eb17b96525d09752fd1f0ad474e3202.tar.bz2 cygnal-602cec7f1eb17b96525d09752fd1f0ad474e3202.zip | |
2013-04-10 Bin Cheng <bin.cheng@arm.com>
* acconfig.h (_FSEEK_OPTIMIZATION): Undef
* newlib.hin (_FSEEK_OPTIMIZATION): Undef
* configure.in (--disable-newlib-fseek-optimization): New option.
* configure: Regenerated.
* libc/stdio/fflush.c (__sflush_r): Use _FSEEK_OPTIMIZATION to
control fseek optimization.
* libc/stdio/fseeko.c (_fseeko_r): Ditto.
* libc/stdio/makebuf.c (__smakebuf_r): Ditto.
* libc/stdio64/fseeko64.c (_fseeko64_r): Ditto.
Diffstat (limited to 'newlib/libc/stdio/fflush.c')
| -rw-r--r-- | newlib/libc/stdio/fflush.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/newlib/libc/stdio/fflush.c b/newlib/libc/stdio/fflush.c index b2bde7af5..ee24cf7ca 100644 --- a/newlib/libc/stdio/fflush.c +++ b/newlib/libc/stdio/fflush.c @@ -80,10 +80,12 @@ _DEFUN(__sflush_r, (ptr, fp), t = fp->_flags; if ((t & __SWR) == 0) { +#ifdef _FSEEK_OPTIMIZATION /* For a read stream, an fflush causes the next seek to be unoptimized (i.e. forces a system-level seek). This conforms to the POSIX and SUSv3 standards. */ fp->_flags |= __SNPT; +#endif /* For a seekable stream with buffered read characters, we will attempt a seek to the current position now. A subsequent read will then get @@ -152,7 +154,9 @@ _DEFUN(__sflush_r, (ptr, fp), { /* Seek successful or ignorable error condition. We can clear read buffer now. */ +#ifdef _FSEEK_OPTIMIZATION fp->_flags &= ~__SNPT; +#endif fp->_r = 0; fp->_p = fp->_bf._base; if ((fp->_flags & __SOFF) && (curoff != -1 || ptr->_errno == 0)) |